Wayland Additive is definitely not the biggest name in metal 3D printing, but they are growing strongly.
electron beam
ALD Vacuum Technologies Launches Massive Metal 3D Printer, the EBuild
ALD Vacuum Technologies has introduced a massive metal 3D printer, the “EBuild”.
Freemelt’s Unusual New Metal 3D Printer Features
We had a look at Freemelt’s latest innovations in metal 3D printing.
From Microscopes to Metal 3D Printers: JEOL’s New Metal AM Machine
A company has re-used microscope technology to create a powerful new metal 3D printer.
An Open Source Electron Beam Metal 3D Printer?
Believe it or not, there is an open source electron beam metal 3D printer project underway.